2218-3620 2218-3620 S2218-36202018000400103 República del Ecuador 00 09 2018 00 09 2018 10 4 103 109

2010 2017 19 5 5 383-96 1996 2017 1996 74 4 4 136 1994 2010 2010 1996 60 3 3 50-68 2011 2010 2013 2008 1996 2008 33 26 26 189-206 1995 73 6 6 75-85 2013 2014 SM Digital 2017 2003 2010